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Modeling the Plasticity of Nanoporous Ni/Ysz High Temperature Fuel Cell Anode Under Uniaxial Loading pp.511-536 $100.00
Authors:  Yong X. Gan, Department of Mechanical, Industrial and Manufacturing Engineering, The University of Toledo, Toledo, Ohio, USA
Abstract:
Thin electrolytes yttria-stabilized zirconia (YSZ) and anode-supported (nanoporous Ni-YSZ ) cells operating in the temperature range of 650-850 C are considered as promising solid oxide fuel cell systems. Understanding the thermalmechanical deformation behavior of the Ni/YSZ interface is critical for the design and durability assessment of the YSZ high temperature fuel cells. One of the problems still remains to be solved is the microstructure instability of the nanoporous Ni at the elevated temperatures. In this work, modeling the thermal-mechanical deformation in the nanoporous Ni/YSZ interface region was performed. Nanoporous Ni thin film bounded to YSZ was considered to establish a simplified 2-D model. On the Ni/YSZ interface, the nanopores are modeled as spherical or cylindrical pores. Crystal lattice rotation due to dislocation motion was simulated and the numerical solutions to the
in-plane lattice rotation for the nanoporous Ni was used to predict the microstructure evolution in the interface area of the Ni/YSZ anode. The loading level effect was examined and the yield surface was constructed and compared with the analytical solutions. 


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Modeling the Plasticity of Nanoporous Ni/Ysz High Temperature Fuel Cell Anode Under Uniaxial Loading pp.511-536